getprotobyname

(PHP 4 , PHP 5)

getprotobyname --  Get protocol number associated with protocol name

Description

int getprotobyname ( string name)

getprotobyname() returns the protocol number associated with the protocol name as per /etc/protocols.

例子 1. getprotobyname() example

<?php
$protocol
= 'tcp';
$get_prot = getprotobyname($protocol);
if (
$get_prot == -1) {
    
// if nothing found, returns -1
    
echo 'Invalid Protocol';
} else {
    echo
'Protocol #' . $get_prot;
}
?>

See also: getprotobynumber().